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. 2016 May 31;9:311. doi: 10.1186/s13071-016-1595-1

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Longitudinal surveys in Mamfe reveal dampened M. perstans infection in DERF but not DHERF zones after >10 years MDA. a Prevalence and b mf intensity in Mamfe district (7 communities) prior to IVM therapy (0 MDA; n = 771) and after at least 10 years of MDA treatment (>10 MDA; n = 615). Analysis of individuals in DERF located communities of Mamfe (Assam, Bache, Kesham and Okpambe) revealed reduced prevalence and mf intensity c and d respectively): 0 MDA; n = 404 and > 10 MDA; n = 376. Infection in individuals of the DHERF communities of Mamfe (Babong, Ogurang and Nkoghau) remained unchanged or trended upwards (e and f): 0 MDA; n = 367 and > 10 MDA; n = 239. Symbols at each time point represent mean prevalence (%) or mf intensity (mf/ml) from one community